In article number 2100088, Leszek M. Mazur and co-workers fabricate two- and three-dimensional nonlinear photonic crystals in the bulk of a single-domain ferroelectric calcium barium niobate (CBN) crystal by employing femtosecond infrared optical pulses to invert spontaneous polarization in CBN. The structures are used to demonstrate nonlinear diffraction via transverse second harmonic generation. This work constitutes the first realization of optically induced spatially localized ferroelectric domains in the bulk of a single-domain crystal and has the potential for applications in nonlinear light processing and frequency conversion.

中文翻译：

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局部铁电畴：通过激光极化在单畴铌酸钙钡晶体中形成局部铁电畴（激光光子学修订版 15(9)/2021）

在文章编号 2100088 中，Leszek M. Mazur 及其同事通过使用飞秒红外光脉冲反转自发极化，在单畴铁电铌酸钙钡 (CBN) 晶体的主体中制造二维和三维非线性光子晶体。立方氮化硼。这些结构用于通过横向二次谐波产生来演示非线性衍射。这项工作首次在单畴晶体中实现了光诱导的空间局部铁电畴，并具有在非线性光处理和频率转换中的应用潜力。